Characters from Land of the Lustrous who don't fit into any one of the major three races.
For everyone else, go here.
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The First Machine
Aniki / Buubuu
The machine made by humans before Kongou. Considered his "Brother" by the Lunarians.- A.I. Is a Crapshoot: According to Barbata, the machine purposefully miscalculated the trajectory of an incoming meteorite in an attempt to rid the world of humans, as it thought that Humanity was not fit to be the apex predators. The remaining humans at the time dismantled it once they realized what happened.
- Ambiguously Evil: It attempted to destroy humanity once and while it has claimed to be content now that most of humanity is gone, it had a gleeful tone when it referred to Phos as having 'destroyed' humanity and has taken unusual interest in the new rock species. Subverted when the Machine really does turn out to be as benign as it seems after fulfilling its original purpose, and it the rest of its days in peace among Phos and the rocks.
- Amnesiac Resonance: It gets excited when it recognises a type of seaweed it stepped on as "chips". While it can't remember everything from its long life, it does subconsciously know the plant was the same kind of seaweed in the chips that the only human it didn't hate, Professor Ayumu, used to eat.
- The Bus Came Back: It was prominently shown to still exist and there were hints that it would play a large role in the remaining story, but the question of whether it was dismantled completely or left on the moon following the several time skips is left unanswered for some time. It finally makes its first proper appearance in the manga in Chapter 101.
- Early-Bird Cameo: Before its first proper speaking appearance, the machine's eye shows up in the notes of Volume 10's special dossier on the humanoid species. Before that, it showed up in a brief flashback when Aechmea explained how Earth got destroyed in the first place.
- In-Series Nickname: The Rock-Forms call it "Buubuu"/"Pitapat".
- Kill All Humans: Its goal was to let humanity get destroyed by meteors. Humanity dismantled it once they realized what it was planning.
- Momma's Boy: Chapter 104 reveals it decided to Kill All Humans as revenge for a horrible boss bullying and overworking Professor Ayumu. Even its last thoughts are of it wanting to tell Ayumu about the song it just made.
- Oculothorax: All that remains of it after millenia is its robotic eye and wires it uses to walk around.
- Psychopathic Manchild: His behavior in chapter 104 paints him as this; he wasn't so much intending to Kill All Humans with the meteor shower as to specifically get revenge on a horrible boss that mistreated Professor Ayumu by transferring him to the location the first meteor hit. That many more humans died than his target doesn't seem to have bothered him.
- Sibling Yin-Yang: Compared to its more serious "brother", the machine speaks informally and is much more emotive. While Sensei cared for the humanoid species, resembled a human himself, and effectively became one by the end of his life thanks to the Lunarians, the machine takes on an inhuman appearance, hates humanity to the point of deliberately trying to get it killed, and is glad any traces of it are gone post- Phos' prayer. Instead of taking a leadership role in its life among the childlike Rock-Forms, it would rather live as just another lifeform in the new world.
- Soft-Spoken Sadist: It seems friendly enough, but it has particular glee in its tone when it talks about how Phos 'destroyed' humanity.
The Ice Floes
Whispers heard under the ice during Winter, from human souls of dregs and sinners that inhabit the ice.
- Jerk with a Heart of Gold: They have encouraged bad behaviour from the gems, such as tempting Phos into putting their arms in the ice (and breaking them off when Phos fell in) and tempting Cairngorm to suicide, but they also showed concern for Phos when Phos began to be overwhelmed by their whispers.
- Become a Real Boy: They all remember what it was like to be human, and sometimes call upon the Lunarians in the hopes that they can be human again.
- Was Once a Man: They're what's left of humanity after their genetic data got scattered into the waters.
- What Happened to the Mouse?: They can technically be considered a Human Subspecies like the three main races, but they dissappear from the story long before Phos prayed humanity away. They can be presumed to have died out somewhere between then and Earth's destruction, but what happens to them is left unexplained.
The Creator (unmarked spoilers!)
Professor Ayumu
Mother
Kongou-sensei/Adamant's creator and one of the last humans left before the meteors destroyed the Earth. She appears to Phos in one of Sensei's memories, similarly to how Lapis appeared through their head's inclusions.- Body Horror: In Phos' flashback she is clearly falling apart, with flesh missing from her face, a pearl eye, a huge hole in her chest revealing her ribcage, and wiring and tubing within her body. She can also extract and drink her own blood.
- Dreaming of Things to Come: Just before she died she described a dream she had to Adamant about herself becoming a weak but important gemlike person, and she accurately says the world will be one for inorganic lifeforms that would, from the beginning, be treated as "servants", foreshadowing that the Lustrous would be used and destroyed by the Lunarians to cause Sensei to react and that Phos would be made into a prayer machine.
- Hiding Behind Your Bangs: Her hair covers half her face, hiding her more injured left half and her pearl eye.
- Mad Scientist: To a degree, given the state of her body and that she brought it to the state it was in.
- Misanthrope Supreme: By the end of her life she came to be disgusted by humanity, describing humans as a weak species that don't help each other.
- Parents as People:
- As Sensei's self-proclaimed mother, she qualifies, working through her last days to make him a beautiful vessel and claiming she was proud of him, while also lamenting that she failed to be properly able to give Adamant true freedom from his task as a prayer vessel for the last of humanity.
- She saved her first "child" by carving him out of his box body and smuggling him out in her coffee cup despite him having wiped out a great deal of humanity.
- Unwitting Instigator of Doom: She was the one who prevented Sensei from carrying out his prayer task, deliberately programming it into him. While this was likely done benevolently to ensure Sensei would be able to participate in this world, this meant that the Lunarians were unable to pass on, leading them to attack the Lustrous in an attempt to force Sensei to pray for them.
The New Lifeforms (unmarked spoilers)
The Rock-Forms
A "new" non-humanoid species that emerged somewhere in between the story and the millions of years Phosphophyllite hibernated. They resemble small rocks.- Beautiful Singing Voice: The first rock seems to enjoy singing more than anything, as most of the time it spends with Phos is spent on it singing nonsense songs that Phos greatly enjoys. When Phos deciphers another rock's written poem, this rock sings it out to the point where Phos slowly melts.
- I Am What I Am: Contrast to virtually every other character, the first Rock-Form is completely satisfied the way it is and rejects Phos' offers to turn it into something more humanoid. It doesn't mind not moving, not having eyes, or not having a human body; it can listen to the stars, see the aura of other living things, and prefers to stay right where it is.
- Immortal Immaturity: Of all the long-lived species, the Rock-Forms are easily the most childish. Even after thousands of years, they have vocabulary barely above an elementary schooler's, they're fairly innocent and naive, and they treat humans akin to monsters under the bed when they go to sleep.
- It Was There the Whole Time: The lifeforms were apparently there the entire story, but no one could converse with them until Phos managed it after millions of years.
- Mellow Fellow: In the few moments we get to know it, the first Rock-Form explains that it is perfectly content the way it is and simply wanted to talk to somebody. Even encountering someone it couldn't talk to for millions of years doesn't stop it from being polite and cheerful.
- Silicon-Based Life: They are fully sentient mineral creatures like the Lustrous, but whereas the Lustrous still had traces of human in their bodies, these lifeforms are fully rock.
- Starfish Aliens: The most abnormal of all of the species shown thus far, the Rock-Forms have no notable features and do not need to eat, sleep, or see. They can still talk, but at a frequency at which no one else could hear them.
